Alert archive / Georgia / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 285, NWS Atlanta, GA

July 20, 2007Haralson County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 20, 2007, 12:33 PM EDT for Haralson County, Georgia. It was in force for 57 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 20, 2007, 12:33 PM EDT (16:33 UTC)
Expired: Jul 20, 2007, 1:30 PM EDT
In force: 57 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County Haralson County, GA

The radar

The Atlanta radar (KFFC), 82 km from the middle of the area, began a volume at 16:33 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jul 20, 12:45 PM EDT	TSTM WND DMG	Waco, GA	BARN BLOWN OFF FOUNDATION AT 884 OLD PLEASANT HILL ROAD...66 POSTS IN BARN STRUCTURE PULLED FROM GROUND. SEVERAL TREES ALSO DOWNED AT LOCATION.
Jul 20, 12:45 PM EDT	HAIL 0.88	Tallapoosa, GA
Jul 20, 1:24 PM EDT	TSTM WND GST 60	Bremen, GA
Jul 20, 1:24 PM EDT	HAIL 0.75	Bremen, GA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 20, 11:21 AM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 4.6 hours before the alert went out and 87 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 652 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 992 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS52 KFFC 201633
SVRFFC
GAC143-201730-
/O.NEW.KFFC.SV.W.0285.070720T1633Z-070720T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1233 PM EDT FRI JUL 20 2007

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HARALSON COUNTY IN NORTHWEST GEORGIA

* UNTIL 130 PM EDT

* AT 1228 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZED HAIL...AND
  DAMAGING WINDS UP TO 60 MPH.  THIS STORM WAS LOCATED 15 MILES
  NORTHWEST OF TALLAPOOSA...MOVING SOUTHEAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BUCHANAN...BUDAPEST AND BREMEN.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

LAT...LON 3392 8539 3365 8533 3368 8515 3384 8513

$$

1 follow-up statement

000 
WWUS52 KFFC 201700
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1255 PM EDT FRI JUL 20 2007

GAC143-201730-
/O.CON.KFFC.SV.W.0285.000000T0000Z-070720T1730Z/
HARALSON GA-
1255 PM EDT FRI JUL 20 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM EDT
FOR HARALSON COUNTY...

AT 1254 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR  
TALLAPOOSA...MOVING SOUTHEAST AT 30 MPH.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

LAT...LON 3392 8539 3365 8533 3371 8507 3388 8508

$$

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 20, 12:47 PM EDT	Severe Thunderstorm Warning	FFC	Carroll	43 min
Jul 20, 1:22 PM EDT	Severe Thunderstorm Warning	FFC	Heard	23 min
Jul 20, 1:26 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Coweta	64 min
Jul 20, 1:36 PM EDT	Severe Thunderstorm Warning	FFC	Douglas, Fulton	39 min
Jul 20, 1:40 PM EDT	Severe Thunderstorm Warning	FFC	Fayette, Spalding	65 min
Jul 20, 1:44 PM EDT	Severe Thunderstorm Warning	FFC	Heard, Meriwether, Troup	61 min
Jul 20, 2:06 PM EDT	Severe Thunderstorm Warning	FFC	Pike	54 min
Jul 20, 2:08 PM EDT	Severe Thunderstorm Warning	FFC	Pike	52 min
Jul 20, 2:27 PM EDT	Severe Thunderstorm Warning	FFC	Lamar, Upson	48 min
Jul 20, 2:41 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether	34 min
Jul 20, 2:58 PM EDT	Severe Thunderstorm Warning	FFC	Monroe	47 min
Jul 20, 3:00 PM EDT	Severe Thunderstorm Warning	FFC	Crawford, Talbot, Taylor	60 min
Jul 20, 3:18 PM EDT	Severe Thunderstorm Warning	FFC	Bibb	57 min
Jul 20, 3:29 PM EDT	Severe Thunderstorm Warning	FFC	Houston, Peach	46 min
Jul 20, 3:39 PM EDT	Severe Thunderstorm Warning	FFC	Twiggs	51 min
Jul 20, 3:55 PM EDT	Severe Thunderstorm Warning	FFC	Wilkinson	50 min
Jul 20, 4:09 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Laurens	66 min
Jul 20, 4:20 PM EDT	Severe Thunderstorm Warning	FFC	Dodge	55 min
Jul 20, 4:26 PM EDT	Severe Thunderstorm Warning	FFC	Johnson, Washington	64 min
Jul 20, 4:50 PM EDT	Severe Thunderstorm Warning	FFC	Montgomery, Treutlen, Wheeler	55 min
Jul 20, 4:58 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel	62 min
Jul 20, 5:10 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Wilcox	21 min
Jul 20, 5:21 PM EDT	Severe Thunderstorm Warning	FFC	Toombs	39 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2007 Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.